Answer
(a) $23~m/s=75~ft/s$
(b) $23~m/s=51~mi/h$
Work Step by Step
(a) We can convert the given speed into feet per second as follows:
$v=23m/s\times 3.281feet/m$
$v=75feet/s$
(b) We can convert the given speed into miles per hour as follows:
$v=23m/s\frac{1mile}{1609m}\times 3600s/hr$
$v=51miles/h$